From: Cryolitia PukNgae <cryolitia@uniontech.com>
Date: Thu, 21 Aug 2025 07:52:36 +0000 (+0800)
Subject: iio: imu: bmi270: Match PNP ID found on newer GPD firmware
X-Git-Tag: v6.18-rc1~74^2~7^2~83
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=dc757dc1572d579c2634c05d0a03c5676227c571;p=thirdparty%2Fkernel%2Fstable.git

iio: imu: bmi270: Match PNP ID found on newer GPD firmware

GPD devices originally used BMI160 sensors with the "BMI0160" PNP ID.
When they switched to BMI260 sensors in newer hardware, they reused
the existing Windows driver which accepts both "BMI0160" and "BMI0260"
IDs. Consequently, they kept "BMI0160" in DSDT tables for new BMI260
devices, causing driver mismatches in Linux.

1. GPD updated BIOS v0.40+[1] for newer devices to report "BMI0260" for
BMI260 sensors to avoid loading the bmi160 driver on Linux. While this
isn't Bosch's VID;
2. Bosch's official Windows driver uses "BMI0260" as a compatible ID
3. We're seeing real devices shipping with "BMI0260" in DSDT

The DSDT excerpt of GPD G1619-04 with BIOS v0.40:

Scope (_SB.I2CC)
{
    Device (BMA2)
    {
        Name (_ADR, Zero)  // _ADR: Address
        Name (_HID, "BMI0260")  // _HID: Hardware ID
        Name (_CID, "BMI0260")  // _CID: Compatible ID
        Name (_DDN, "Accelerometer")  // _DDN: DOS Device Name
        Name (_UID, One)  // _UID: Unique ID
        Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
        {
            Name (RBUF, ResourceTemplate ()
            {
                I2cSerialBusV2 (0x0069, ControllerInitiated, 0x00061A80,
                    AddressingMode7Bit, "\\_SB.I2CC",
                    0x00, ResourceConsumer, , Exclusive,
                    )
            })
            Return (RBUF) /* \_SB_.I2CC.BMA2._CRS.RBUF */
        }
        # omit some noise
    }
}

Link: http://download.softwincn.com/WIN%20Max%202024/Max2-7840-BIOS-V0.41.zip #1
Signed-off-by: Cryolitia PukNgae <cryolitia@uniontech.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Alex Lanzano <lanzano.alex@gmail.com>
Link: https://patch.msgid.link/20250821-bmi270-gpd-acpi-v4-1-5279b471d749@uniontech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/imu/bmi270/bmi270_i2c.c b/drivers/iio/imu/bmi270/bmi270_i2c.c
index c77839b03a969..b909a421ad017 100644
--- a/drivers/iio/imu/bmi270/bmi270_i2c.c
+++ b/drivers/iio/imu/bmi270/bmi270_i2c.c
@@ -41,6 +41,8 @@ static const struct i2c_device_id bmi270_i2c_id[] = {
 static const struct acpi_device_id bmi270_acpi_match[] = {
 	/* GPD Win Mini, Aya Neo AIR Pro, OXP Mini Pro, etc. */
 	{ "BMI0160",  (kernel_ulong_t)&bmi260_chip_info },
+	/* GPD Win Max 2 2023(sincice BIOS v0.40), etc. */
+	{ "BMI0260",  (kernel_ulong_t)&bmi260_chip_info },
 	{ }
 };